tcg/loongarch64: Implement goto_ptr

Signed-off-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211221054105.178795-11-git@xen0n.name>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

tcg/loongarch64/tcg-target-con-set.h

@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Define LoongArch target-specific constraint sets.
+ *
+ * Copyright (c) 2021 WANG Xuerui <git@xen0n.name>
+ *
+ * Based on tcg/riscv/tcg-target-con-set.h
+ *
+ * Copyright (c) 2021 Linaro
+ */
+
+/*
+ * C_On_Im(...) defines a constraint set with <n> outputs and <m> inputs.
+ * Each operand should be a sequence of constraint letters as defined by
+ * tcg-target-con-str.h; the constraint combination is inclusive or.
+ */
+C_O0_I1(r)

tcg/loongarch64/tcg-target.c.inc

@@ -397,9 +397,24 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
         tcg_out_mb(s, a0);
         break;
 
+    case INDEX_op_goto_ptr:
+        tcg_out_opc_jirl(s, TCG_REG_ZERO, a0, 0);
+        break;
+
     case INDEX_op_mov_i32:  /* Always emitted via tcg_out_mov.  */
     case INDEX_op_mov_i64:
     default:
         g_assert_not_reached();
     }
 }
+
+static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op)
+{
+    switch (op) {
+    case INDEX_op_goto_ptr:
+        return C_O0_I1(r);
+
+    default:
+        g_assert_not_reached();
+    }
+}